????:1???????:?????

2?????????????

3?????VX??

4??????

5???????

????(????????):?????????????,????,????,????????????????????????

???????,????,????????????????????????????????????9?????????,????20%???????,??????????????20.5%,????17.1?????,???????????,????0.1?????

??,????,??????????7.9%,???????????4.6????,?????25.7%,??18?????????????0.1????????????,???????????????

?????????????,????,????????????????????????????,????6.7%,?????????????????3.7????????????????????????,?????????????????????????

?????????????????????????????:??????????????????????